diplodocus.org Git - nmh/blob - sbr/showfile.c

   1
   2 /*
   3  * showfile.c -- invoke the `lproc' command
   4  *
   5  * $Id$
   6  */
   7
   8 #include <h/mh.h>
   9
  10
  11 int
  12 showfile (char **arg, char *file)
  13 {
  14     pid_t pid;
  15     int isdraft, vecp;
  16     char *vec[MAXARGS];
  17
  18     context_save();     /* save the context file */
  19     fflush(stdout);
  20
  21     /*
  22      * If you have your lproc listed as "mhl",
  23      * then really invoked the mhlproc instead
  24      * (which is usually mhl anyway).
  25      */
  26     if (!strcmp (r1bindex (lproc, '/'), "mhl"))
  27         lproc = mhlproc;
  28
  29     switch (pid = vfork()) {
  30     case -1:
  31         /* fork error */
  32         advise ("fork", "unable to");
  33         return 1;
  34
  35     case 0:
  36         /* child */
  37         vecp = 0;
  38         vec[vecp++] = r1bindex (lproc, '/');
  39         isdraft = 1;
  40         if (arg) {
  41             while (*arg) {
  42                 if (**arg != '-')
  43                     isdraft = 0;
  44                 vec[vecp++] = *arg++;
  45             }
  46         }
  47         if (isdraft) {
  48             if (!strcmp (vec[0], "show"))
  49                 vec[vecp++] = "-file";
  50             vec[vecp++] = file;
  51         }
  52         vec[vecp] = NULL;
  53
  54         execvp (lproc, vec);
  55         fprintf (stderr, "unable to exec ");
  56         perror (lproc);
  57         _exit (-1);
  58
  59     default:
  60         /* parent */
  61         return (pidwait (pid, -1) & 0377 ? 1 : 0);
  62     }
  63
  64     return 1;   /* NOT REACHED */
  65 }